BROWSE

Related Scientist

Researcher

김정진
나노물질 및 화학반응 연구단
more info

Ambient-pressure atomic force microscope with variable pressure from ultra-high vacuum up to one bar

Cited 0 time in webofscience Cited 0 time in scopus
25 Viewed 2 Downloaded
Title
Ambient-pressure atomic force microscope with variable pressure from ultra-high vacuum up to one bar
Author(s)
Joong Il Jake Choi; Jeong Jin Kim; Wooseok Oh; Won Hui Doh; Jeong Young Park
Publication Date
2018-10
Journal
REVIEW OF SCIENTIFIC INSTRUMENTS, v.89, no.10, pp.103701 -
Publisher
AMER INST PHYSICS
Abstract
We present the design and performance of an ambient-pressure atomic force microscope (AP-AFM) that allows AFM measurements using the laser deflection technique in a highly controlled environment from ultra-high vacuum (UHV) up to 1 bar with various gases. While the UHV of the AP-AFM system is obtained by a combination of turbo-molecular and ion pumps, for the higher-pressure studies, the ambient-pressure chamber is isolated from the pumps and high-purity gases are dosed via a leak valve from a gas manifold. The AP-AFM system, therefore, provides versatile AFM techniques, including the measurement of topography, friction and local conductance mapping, and force spectroscopy in a highly controlled environment with pressures ranging from UHV up to atmospheric pressure. Atomically resolved stick-slip images and force spectroscopy of highly ordered pyrolytic graphite (HOPG) at variable pressure conditions are presented to demonstrate the performance of the AP-AFM system. Force spectroscopy results of vacuum-cleaved HOPG, followed by exposure to lab air, oxygen, and methane show that adhesion between the AFM tip and the HOPG depends significantly on the exposed gas and pressure. Our results show that the deposition of airborne hydrocarbon impurities at ambient conditions leads to a significant change in adhesion force, implying that the wettability of the HOPG surface depends on the environment and the pressure. (c) 2018 Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/5134
ISSN
0034-6748
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
REVIEW OF SCIENTIFIC INSTRUMENTS 89, 103701 (2018).pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse